Car truck



B. W. KADEL.

CAR TRUCK.

APFLlCATlON FILED JAN. 28, 1921.

1,414,957., Patenteo'l May 2, 1922.

To all whom concern:-

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Be it known that I, Brnns W. KAnnL, a

citizen of the United States, residing at a Baltimore, inthe State ofMaryland, have invented certain" new and useful Improvements in- Car Trucks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it Fjppertains to make'and use the same.

A y invention relates to flexible car trucks and is particularly concerned with. theproduction of an improved form of flexible truck in which means are provided for yieldingly resisting relative displacement of the side frame members longltudinally of the truck and for restoring the truck parts to normal or square relation.

The principal object of the invention is to provide a truck structure of the character indicated in which the means for yieldingly controlling the i'el'ative longitudinal movements of the side frames is well adapted for cooperation with the truck bolster. A further object of the invention is to rovide simple and compactly arranged devices constitutin the means for yieldingly resisting longitudinal--displacement of. the

- side frames and for restoring them to nermal position- A further ob ect is to pro- I duce-a flexible truck structure in which the means for controlling the movements of the side frames are well suited for use with frame members which are cast as an inte alunit. 1

he primary feature of the inventionby which the foregoing objects, are accomplished consists in providing each of the truck side frames with two part bolster ide columns and in operatively interposing between cooperating guide column parts sprin means which are adapted to be energized upon a relative longitudinal displacement of the side frame members from normal position.

There are other features of the invention relating'to elements of construction and to particular combinations of elements, all as will hereinafter .ap ear.

In the drawings i lustrating the preferred form in which I contemplate applying the principle of my invention, the scope whereof 1s ointed out in the claims igure lis a view, partly in plan and Specification-of Letters Patent. Application filed January 28, 1921. Serial No. 440,598.

horizontally with respect to' the side frames atented May 2,1922.

partly in horizontal section, of a car truck .embodymg the invention, the parts being in relation suchas they occupy when the truck is passing around a curve. Y

Figure 2 is a detail view, partly. in elevat1on and partly in vertical section, of the central portion of one of the side frame members and the parts associated therewith. Figure 3 is a detail sectional view on the line '33, Fig. 2.

' In the drawings, 1 indicates the side frame movable members of the bolster ide columns, are preferably cast integral. ach of'the side frame members is furnished at its opposite ends with journal boxes 2 receiving the journal ends of axles 3 upon which the truck wheels 4.are mounted. If, as illustrated in the drawings, the journal boxes are not made integral withw the side frames they may be secured to the. latter by means of journal'box bolts 5 in a well known manner.

6 indicates the truck bolster which is adapted to move vertically and to angle of the truck. To maintain the bolster in proper operative relation to the side .frames 1, said bolster is preferably provided oneach side at its opposite ends with lugs or guide blocks 7 between eachpair-of which one of the movable bolster guide members 8 extends. The lugs 7 are spaced apart sufiiciently so that, as illustrated in Fig. 1, they allow the bolster freely to angle horizontally as the side frames 1 execute relative longitudinal movements.

While the bolster 6 forms a means for connectingthe side frames across the truck, it is also preferred to connect said side frames by, means of a spring plank 9 whose opposite ends proj'ect into. the bolster openings. 10 of the side frames and rest upon the latter. The spring plank may be conveniently attached to the side frame members by providing each of the latter at thecenter of its bolster opening with an upwardly extending pivot boss 11 which enters a correspondingly formed opening 12 in the neighboring end of the spring plank. Suitable springs, such as 13, are interposed be- 105 members which with the exception of the Each bolster guide column of the side frames 1 comprises a rigid portion 8 and a cooperating movable portion 8, the latter being adapted to engage the sides of the bolster 6 and to turn with respect to the rigid parts 8 of the guide Columns conformably to the horizontal angular movements of the bolster. The rigid portions 8 of the columns are preferably recessed, as at 14. to receive the movable guide members 8, sutlicient clearance being allowed between them transversely of the truck to permit the movable parts 8 to turn through'the requisite angle. Housed within the respective recesses 14: on opposite sides of the bolster are vertically extending coil springs 15. One end of each of these springs is rigidly secured to the adjacent movable column 8 while its other end is similarly attached to the neighboring rigid column member 8 such construction permitting the springs 15 to be torsionally energized when the movable guide column members 8 are turned or rotated by the horizontal angular movement of the bolster 6. A convenient mode of securing the springs to the guide column members 8 and 8 is to provide said members with recesses 16 and 17, respectively, and to bend the ends of the springs so that they extend into said recesses.

lln assembling the truck structure the springs 15 are inserted in the guide column recesses 14 of the side frames 1 and the lower ends of the springs are entered in the openings 17. The upper ends of the torsional springs 13 are then pulled out of the recesses 14 and entered in the apertures 16 of the respective guide column members 8, the latter being drawn to assembled position in the recesses lt upon the springs being relieved of strain. within the lower portions of the bolster open in s 10 and is moved upwardly between the hostel guide columns, after which the spring plank 9 and the bolster springs 13- are put in place.

When the side frame members 1 are displaced longitudinally of the truck from normal position the bolster 6 executes a horizontal turning or angular movement. This movement of the bolster causes a corresponding rotation of each of the movable bolster column guide members 8, thereby resulting in the several springs 15 being torsionally energized. Upon the cessation of the force effecting the out of square displacement of the side frame members 1, the energy stored in the springs 15 reacting.

through the bolster 6 returns the side frames 1 to normal or square position.

it claim 1. In a car truck, the combination with side frame members which are relatively movable longitudinally of the truck, of means for connecting said side frame mem- The bolster 6 is then inserted names? bers, said means being adapted to have a pivotal movement with reference to said side frame members, and vertically extending yielding means carried by said side frame members for resisting a longitudinal displacement of the latter from normal position.

2. lln a car truck, the combination with side frame members which are relatively movable longitudinally of the truck, of means for connecting said side frame members, and vertically arranged coil spring means located at the side of said connecting means and operable against the side frame members for resisting a longitudinal displacement of either side frame member from normal position.

3. lln a car truck, the combination with side frame members which are relatively movable longitudinally of the truck, of

transversely extending means for connecting said side frame members, and torsional spring means carried by at least one-of said side frame members and arranged on opposite sides of said connecting means for resisting a relative longitudinal displacement of said frame members from normal position.

a. In a car truck, the combination with, side frame members which are relatively movable longitudinally of the truck, of means for connecting said side frame members, and torsional spring means mounted on at least one of said side frame members and arranged on opposite sides of said connecting means for resisting longitudinal displacement of either side frame member from normal position.

5. lln a car truck, the combination with side frame members which are relatively movable longitudinally of the truck, and which are provided with bolster guide column members having openings therein, of means for connecting said side frame members, and torsional springs located in said openings, said springs being adapted to resist a longitudinal displacementof one of said side frame members from normal position.

6. In a car truck, the combination with side frame members which are relatively movable longitudinally of the truck and which are furnished with two part bolster guide columns, of a bolster adapted to have its opposite ends positioned between the said columns of each side frame member, and yielding means interposed between the parts of said bolster guide columns and adapted to be energized by a longitudinal displacement of either side frame member from normal position. a I

7. In a car truck, the combination with side frame members which are relatively movable longitudinally of the truck, and whioh are furnished with rigidly connected bolster guide column members each of which is provided with a recess'therein, of a bolste'r adapted to extend between the said guide columns of each side frame member, and upright spring means located in said recesses for yieldingly opposing relative longitudinal movement of said side frame members from normal position.

8. In a car truck, the combination with side frame members which are relatively movable longitudinally of the truck, of means for movably connecting said side frame members across the truck, and torsional spring means carried by one of said side frame members and arranged on 0p-' posite sides of said connecting means, said spring means being adapted to be energized by a relative longitudinal displacement of said side frame members from normal position and also being adapted to return said frame members to normal position after the I same have been displaced therefrom.

9. ln a car truck, the combination with side frame'members which are relatively movable longitudinally of the truck, of a vertically movable bolster which is adapted to angle horizontally with respect to said frame members, vertically arranged bolster springs operatively interposed betweensaid bolster and the respective side frame members for ieldingly supporting said bolster against ownward vertical movement, and vertically arranged coil springs disposed on opposite sides of said bolster and adapted yieldingly to resist relative longitudinal displacement of said side frame members from normal position.

In testimony whereof I afiix my signature BYERS W EL. 

